The first one is a Miner Bee, but I'm not sure about the second.
Tech specs: Canon 40D (F13, 1/250, ISO 100) + a Canon MPE-65mm macro lens (@3x) + a diffused MT-24EX macro twin flash (-2/3 FEC).
Tech specs: Tech specs: Canon 40D (F13, 1/250, ISO 100) + a Canon MPE-65mm macro lens (@1x) + a diffused MT-24EX macro twin flash (manual mode 1/32 power). Cheap trick: I set the flash to manual mode and the power level so that I could correctly expose the flower. Since that yellow is pretty much the most reflective part of the scene as long as I have the flash set to expose it the subject will be exposed properly as well.